Feature: Ergonomic backrest design with thick padding provides super comfort Mesh fabric is breathable and comfortable Rocking function for taking a break and stretching out your back Headrest can move up and down and rotate to provide comfort for you Adjustable seat and armrest height matches your desk or your sitting style Plastic case lumbar support, make your back supported, and keep you cool High-end gas lift makes height adjustment smoothly 5 swivel wheels and seat ensure easy and quick mobility Assembly required Specification: Colour: Black Material: Mesh, Sponge, ABS Overall Dimension: 65.5W x 65D x 122-132H cm Seat Size: 51L x 52W x 9D cm Seat Height: 49-59cm Backrest Size (from seat): 90L x 50.5W x 7.5D cm Backrest Height: 79cm Armrest Size: 24L x 9W cm Armrest Height (from seat): 18-26cm Headrest Size: 34W x 15H cm Weight Capacity: 136kg Item Label: 921-513V71BK 1 x Office Chair 1 x Manual